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Match the correct ionization enthalpies $(Δ H_{1}, Δ H_{2})$ and electron gain enthalpies of the following elements
i) Most reactive non metal ii) Most reactive metal
iii) Least reactive element iv) Metal forming binary halide

$Δ H_{1}$ $Δ H_{2}$ $Δ_{e g} H$
a 419 3051    - 48
b 1681 3374    - 328
c 738 1451    - 40
c 2372 5251 + 48

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$i - a i i - b i i i - c i v - d$

$i - b i i - c i i i - a i v - d$

$i - b i i - a i i i - d i v - c$

$i - a i i - c i i i - b i v - d$

answer is C.

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